SpringBoot配置文件的加载顺序（存放位置、文件类型）

SpringBoot配置文件默认为application.*和application-default.*，如果通过spring.config.name属性指定了自定义配置文件名则加载读取指定的配置文件；扩展名有四个：*.properties、*.xml、*.yml、*.yaml

spring.factories中加载配置文件的顺序为：

file:./config/application.properties
file:./config/application.xml
file:./config/application.yml
file:./config/application.yaml

file:./application.properties
file:./application.xml
file:./application.yml
file:./application.yaml

classpath:/config/application.properties
classpath:/config/application.xml
classpath:/config/application.yml
classpath:/config/application.yaml

classpath:/application.properties
classpath:/application.xml
classpath:/application.yml
classpath:/application.yaml

file:./config/application-default.properties
file:./config/application-default.xml
file:./config/application-default.yml
file:./config/application-default.yaml

file:./application-default.properties
file:./application-default.xml
file:./application-default.yml
file:./application-default.yaml

classpath:/config/application-default.properties
classpath:/config/application-default.xml
classpath:/config/application-default.yml
classpath:/config/application-default.yaml

classpath:/application-default.properties
classpath:/application-default.xml
classpath:/application-default.yml
classpath:/application-default.yaml

取值时读取配置文件的顺序为：properties->yaml->yml